Well-tube strainer.



PATENTED NOV. 5, 1907.

G. H. SHOE'MAKER. WELL TUBE STRAINER.

APPLICATION FILED 00113, 1905.

GEORGE HOWARD SHOEMAKER, OF BENTON TOWNSHIP, BERRIEN COUNTY, MICHIGAN.

WELL-TUBE STRAINER.

Specification of Letters-Patent.

Patented Nov. 5, 1907.

Application filed October 13. 1905- Serial No. 282,637-

To all whom 'it may concern:

Be it known that I, GEORGE HOWARD SHOEMAKER, a citizen of the UnitedStates, and resident of Benton township, in the county of Berrien, inthe State of Michigan, (model and preliminary application 220,468O and203,507 0 having been submitted from South Bend, in the county of St.Joseph, in the State of Indiana,) have invented a new and usefulWell-Tube Strainer, of which the following is a specification.

My invention relates to well tube strainers i. e., devices forpermitting Water to enter well tubes while preventing the entry of sand,gravel and similar substance; and it consists in the peculiar andadvantageous well tube strainer hereinafter described and specificallydefined in the claims appended.

In the accompanying drawings which are made a part hereof: Figure 1 is aview, partly in elevation and partly in section, of a well tube strainerconstituting one embodiment of my invention. Fig. 1 is a detail sectionon an enlarged scale showing the specific manner in which I prefer tofixedly connect the screen of reticulated material to the outerforaminated tube of the strainer. Fig. 2 is a View similar to Fig. 1.

Referring by letter to the said drawings and more particularly to Figs 1and 1* thereof: F is a tube or pipe such as are employed in drive ortubular wells, and B is the outer, foraminated tube of my novelstrainer. The said tube B is provided at its lower end with the usualpoint D, and at its upper end is coupled, as indicated by E, to thelower end of the tube or pipe F.

In addition to the outer, foraminated tube B my novel strainer comprisesa tubular screen A, of reticulated material, arranged close against theinner side of the tube B, and an inner foraminated tube G, preferably ofbrass, arranged against the inner side of said tubular screen A. Thetubular screen A is fastened with solder on the inside at the top andbottom and at various intervals along the strainer through holes to keepthe screen in place. One of these latter connections is illustrated inFig. 1* in which G is a mass of solder or analogous material extendingthrough an aperture of the foraminated tube B and fixed at its inner endin the interstices of the tubular screen A. This mode of connection, aswill be readily appreciated, may be quickly efiected and may be dependedon to hold the tubular screen A close against the inner side of theouter foraminated tube B as well as against endwise movement withrespect thereto. The latter is due to the fact that the plurality ofsolder connections G are disposed at right angles to the length of thetubular screen A and are securely fixed at their inner ends in theinterstices of said tubular screen.

l l a l l The office of the inner foraminated tube O is to keep thetubular screen A out against the foraminated tube B; and it may besecured in position by frictional contact with the said tubular screenor by any other means compatible With the purpose of my invention.

By virtue of the construction of my novel strainer it will be seen thatthere is no liability of the tubular screen A being torn or otherwiseinjured during the driving of the strainer through fine sand, gravel orrocks; also, that it renders it feasible to provide the outer tube Bwith a large number of closely arranged, small apertures, which preventssand packing close to the screen and in that way increases theefliciency of the strainer.

The strainer shown in Fig. 2 is similar to that shown in Figs. 1 and 1with the exception that it is smaller in diameter, has no shoulder atthe upper end of its point F and is provided on the upper portion of itsouter foraminated tube B with a rubber or lead ring G. This type ofstrainer is designed more particularly to be dropped inside the old typeof strainer indicated by H when the latter is torn or otherwiseimpaired; the ring G serving when this is done to prevent sand fromworking past the outer side of the upper portion of the strainer. Whilepreferable the point F is not essential to the embodiment shown in Fig.2, and it may, therefore, be omitted when desired without affecting myinvention.

Having described my invention, what 1- claim and desire to secure byLetters Patent is:

1. In a well tube strainer. the combination of an outer foraininatedtube, an inner foraminated tube contained in the outer tube, a tubularscreen of reticulated material interposed between and arranged closeagainst the outer and inner foraminated tubes, and a solder connectionoccupying one of the openings in the outer tube and extend ing inward ata right angle therefrom and fastened of itself at its inner end in theinterstices of the tubular screen, for the purpose set forth.

2. In a well tube strainer, the combination of an outer foraminatedtube, an inner foraminated'tube contained in the outer tube, a tubularscreen of reticulated material interposed between and arranged closeagainst the outer and inner foraminated tubes, a solder connectionoccupyingone of the openings in the outer tube and extending inward at aright angle therefrom and fastened of itself at its inner end in theinterstices of the tubular screen, and a packing ring fixed on the outerside of the upper portion of the outer foraminated tube, for the purposeset forth.

GEORGE HOWARD SHOEMAKER.

Witnesses: .9

MILLARD A. SEITZ, FRANCIS M. THORP.

